SQL ManualSQL FunctionsAggregate FunctionsSUMOn this pageSUMSUMDescriptionSyntaxSum (Expr)Used to return the sum of all values of the selected fieldexampleMySQL > select sum(scan_rows) from log_statis group by datetime;+------------------+| sum(`scan_rows`) |+------------------+| 8217360135 |+------------------+keywordsSUM